Bushranger

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About Bushranger

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  1. I do not remember where I read it, but some of the astronauts missed a massive wave of radiation by a few days. Those radiation storms are not the same as the constant radiation exposure on a typical space venture. They can come at anytime, would be devastating to the human body in a single exposure. Aside from that, the short exposure of the apollo astronauts seems to have had negative effects that were worse than anticipated. https://observer.com/2016/07/space-radiation-devastated-the-lives-of-apollo-astronauts/
  2. They are talking about generating a magnetic field to contain the heat generated by the ion engine...where will the get the power to do that? There have been astronauts/cosmonauts in the international space station for over a year at a time. Nevertheless, the effect of cosmic rays is cumulative...that is the issue. That is what I am concerned about. It would seem that the issue of cosmic rays will need to be addressed before any lengthy trips in space are attempted, including Mars inasmuch as they will undoubtedly stay for awhile ( the astronauts will be subjected to cosmic rays on Mars as well as in transit), before coming back...two and one half years?
  3. Would the magnetic field to protect from cosmic rays be any more powerful than the magnetic field they are talking about generating around the ionic engine? According to the Nova presentation, cosmic rays are a serious problem, especially over the time of exposure that would be relative to a Mars mission. Why would a magnetic field attract ionic particles? Does not the Earth's magnetic field deflect (redirect)them?
  4. I have just watched "Can We Make it to Mars?" , a Nova DVD from Netflix. My focus of the several problems that hazzard space travel, are cosmic rays. We here on earth are protected from cosmic rays via the magnetic field surrounding earth. However, in a space ship, there is no protection and such rays are of concern to scientists. My question is relative to the anticipated Ion engine (radio waves stimulating Argon gas to ionize, producing a speed that would allow the ship to get to Mars in 39 days instead of the 9 or so months). The program stated that the ion engine would produce such high heat that it must be enclosed in a magnetic field. If that is so, and the plan on testing such engine in space soon, why not extend the magnetic field to the entire ship to shield from cosmic rays? Am I missing something vital here, or would such be possible?
  5. By what mechanism do cough drops work...or don't they? Sucking on a cough drop and swallowing the product, it goes down the esophagus which leads to the stomach, but it seems to me the cough is located in the the trachea which leads to the lungs and no liquid normally goes down there. Therefore, how can sucking on a cough drop have any effect on the irradiation in the trachea where the irritation that causes coughs originate. Are the fumes from the medicated (or unmedicated) cough drops inhaled and as such deliver some soothing vapor, or are cough drops a placebo plain and simple?
  6. I am recycling some metals (Aluminum and Zinc). The salvage yard requires that the metals be kept seperate. From my high school chemistry, I remember that Hydrochloric acid (HCL) applied to Zinc (mossy), produces Hydrogen gas (HCL + Zn = H2 and ZnCl2). Supposedly, that is the "test" for Zinc. However, when I apply Hydrochloric Acid to known Aluminum, it releases a gas also, albeit less of a vigorous reaction. And again from my high school chemistry, if a gas is produced, it is also most certainly Hydrogen (HCL + Al = H2 and AlCl2). What am I missing here? How can I determine if the metal(s) in question is/are Zinc or Aluminum using acids (I have both HCL and H2SO4 to work with)?
  7. Sound waves are part of the electromagnetic spectrum as are light and radio waves. However, sound waves cannot pass through a vacuum. Why/how is it that they cannot?
  8. You still do not seem to get it. Those fire escape tunnels were only used a short time...then abandoned within a year as they lost function (slipperiness)...they are not what is used in modern times. As for, "...going there and taking a sample.", I would need a time machine because the school(s) and the Aluminum (or stainless steel tubes) have been gone for about 50 years or so. "...examine in mass spectrometer..." If I had a sample, I would not need to pull a mass spectrometer out of my butt ...all I would need is a Oxyacteline torch. Aluminum melts at about 1200 degrees...way before reaching Red heat, where as steels melt at about 2700 degrees (Red heat). You knowledge of metals seems to be theoretical rather than practical. It seems the mystery remains...but, if my theory (the formation of Aluminum Oxide), holds, they were constructed of Aluminum, not stainless steel(s), and were an example of not understanding the properties or requirements when choosing a material.
  9. You missed a couple of important details. My question pertained to the escape tubes that replaced steel stairway fire escapes in the fifties...you can tell by the cars in the picture that it was not modern times. The link you provided and your comment pertain to modern escape tubes which are not relevant to my question.
  10. The thread is about I.Q.s and/or intelligence required to enter the military and/or become a doctor. Your post, which may or may not be true, seemingly has deviated from the issues and become (in your mind), become a psychological and a moral issue.
  11. Although I was in the military in the early sixties, and certain jobs had higher I.Q. requirements, I don't know why that would have changed. Therefore, not all jobs (MOS's) in the military would be open to hose with "weaker I.Q.'s". Also, what do you mean by a "normal iq"? 100 is average. If you have a high I.Q. (130 or higher), and you associated with persons with 100 (or thereabouts) I.Q.'s you would become aware (vocabulary, intestes, etc.) that a person with a 100 is not all that intelligent. When it comes to scientists and such as medical doctors, a person with a "normal" I.Q. (i.e., 100) is unlikely to achieve such. For instance, look at the bottom entires on this chart: https://www.quora.com/What-are-good-jobs-for-people-with-a-90-98-IQ-Am-I-hopeless
  12. Nevertheless, from the perspective of the Army using an I.Q. test to qualify persons to enter Officer Candidate School, it would be a purely pragmatic way of doing so in that they do not want the blind, those who cannot read/write English nor those who have not used a pen (actually a number 2 pencil), before.
  13. Michigan. All the fire escapes were switched out to the tube types in all the schools in my home town of Ludington, MI. They all stopped working shortly after they were installed. At first we shot through them at a dangerous speed...a teacher would stand about eight feet away from the opening and grab the kids to keep them from falling. They got slower and slower until the kids had to "scoot" down them using their feet to descend. You can see the tube in the photo I have attached. That is a plicture of my grade school in the fifties, "Pere Marquette School", in Ludington, Mi.
  14. When I was a kid, there was a big move to replace steel fire escape open stairs on schools with a metal tube-slide. They worked fine for awhile, but all to shortly, they lost their slipperiness, would not longer work as a slide...kids would get stuck, therefore they lost their function and were abandoned. As an adult who learned about metallurgy, I attributed the loss of function to the fact that they were constructed from Aluminum and once the protective wax (an assumption it was a wax), wore off, the Aluminum quickly formed its Oxide resulting in a microscopic layer of Aluminum Oxide... which is an abrasive due to the sharp crystalline edges. However, someone claims that the tubes were not Aluminum, but were Stainless Steel. I have performed internet searches to find what metal they were made of, with negative results. Can anyone attest as to which metal they were actually made of?
  15. Your answer does not make sense to me. If a big portion of the hull is out of the water, its design is moot as to slowing it down in air.